How do I confirm pilotpart351749 fits my machine?

Compare the OEM or reference part number, machine model, engine model, and serial number. You can also submit a fitment inquiry before ordering.

In Stock

Boom Cylinder Seal Kit 4320990 For Hitachi EX120K-3

For Hitachi Seal Kits

Seal Kits 4320990 for Hitachi

OEM / REF: 4320990SKU: pilotpart351749

Boom Cylinder Seal Kit 4320990 For Hitachi EX120K-3 is a Seal Kits replacement part indexed for Part Number and Model: Hitachi EX120K-3 OEM 4320990 Specification: Rod: 70 mm Bore: 105 mm Note: Please contact us to confirm the hydraulic seal kit you need before buying, thank you!. Match OEM part number 4320990 and co...

Stock: In stock
Condition: New
Fitment: Hitachi Seals, Filters & Maintenance Parts
Category: Seal Kits

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$152.61USD/EA

~~$29,899.00~~Save 99%

Estimated delivery by quantity

Estimated delivery windows
Qty	Estimated delivery
1	Nov 8 – Nov 15
10	Nov 6 – Nov 13
50	Nov 4 – Nov 11

Estimates from today; confirm exact lead time before payment.

Quantity

Confirm fitment before ordering →

Lead times can vary by freight route and customs. Contact support for expedited shipping.

Seal Kits Description

This Seal Kits is indexed for Part Number; Model: Hitachi EX120K-3 OEM 4320990 Specification: Rod: 70 mm Bore: 105 mm Note: Please contact us to confirm the hydraulic seal kit you need before buying, thank you!. Compare reference number 4320990 against the label on your existing Hitachi component before ordering.

Before checkout, compare OEM part number 4320990, connector layout, mounting position, and machine serial number. For high-value or fitment-sensitive parts, submit the fitment form below so support can verify the match.

Part Numbers and Cross References

4320990

Applications

Part Number
Model: Hitachi EX120K-3 OEM 4320990 Specification: Rod: 70 mm Bore: 105 mm Note: Please contact us to confirm the hydraulic seal kit you need before buying, thank you!

Specifications

Part Number	4320990

Fitment Notes

Brand or application signal: Hitachi Seals, Filters & Maintenance Parts
Product family: Seal Kits
System category: Seals, Filters & Maintenance Parts > Seal Kits > Seal Kits
Recommended verification: OEM number, engine model, serial number, old part photos, and dimensions.

Shipping & Returns

Availability: InStock
Shipping: Shipping quotes can be confirmed before payment for heavy or urgent orders.
Returns: Returns are easier when fitment is confirmed before ordering.
B2B support: Bulk, fleet, and repair-shop requests can be handled through the inquiry form.

Frequently Asked Questions

How do I confirm this part fits my machine?

Match the OEM or reference number first, then verify machine model, engine model, serial number, connector layout, mounting points, and old part photos.

Can I order if my part number is not listed?

Yes. Send the old part number, machine plate, and photos through the fitment inquiry form. Support can review possible replacements or alternatives.

Is this an OEM part?

Products are indexed as replacement parts unless explicitly marked otherwise. Always compare reference numbers and confirm fitment before purchase.